Welcome...
What degree are the S4's, what kind of lenses are in the pars? Do you have any color in any of the instruments?
How high are the electrics?
First, those
cyc lights should be able to spit some serious light onstage. Are you just trying to cover the stage, or are you trying to do something artistic? Not know your set up... here is what I would "traditionally do.
Take the lekos and use them in a front light position IN FRONT of the stage, I have a feeling that the reason you think the stage is night bright enough is because everyones head is lit but their face is not.
Use the Par64 as side light, 2 on each end of the
electric. That should give you a bit of pop.
Use the cyc lights as backlight from the 2nd and 3rd, that being if you can not use them on an actual cyc. Use the parnels as front light from the first, use the s4pars as extra side light (pipe-ends) or a backlight system.